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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/drivers/opp/debugfs.c
....@@ -1,11 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Generic OPP debugfs interface
34  *
45  * Copyright (C) 2015-2016 Viresh Kumar <viresh.kumar@linaro.org>
5
- *
6
- * This program is free software; you can redistribute it and/or modify
7
- * it under the terms of the GNU General Public License version 2 as
8
- * published by the Free Software Foundation.
96  */
107 
118 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
....@@ -35,7 +32,48 @@
3532 	debugfs_remove_recursive(opp->dentry);
3633 }
3734 
38
-static bool opp_debug_create_supplies(struct dev_pm_opp *opp,
35
+static ssize_t bw_name_read(struct file *fp, char __user *userbuf,
36
+			    size_t count, loff_t *ppos)
37
+{
38
+	struct icc_path *path = fp->private_data;
39
+	char buf[64];
40
+	int i;
41
+
42
+	i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));
43
+
44
+	return simple_read_from_buffer(userbuf, count, ppos, buf, i);
45
+}
46
+
47
+static const struct file_operations bw_name_fops = {
48
+	.open = simple_open,
49
+	.read = bw_name_read,
50
+	.llseek = default_llseek,
51
+};
52
+
53
+static void opp_debug_create_bw(struct dev_pm_opp *opp,
54
+				struct opp_table *opp_table,
55
+				struct dentry *pdentry)
56
+{
57
+	struct dentry *d;
58
+	char name[11];
59
+	int i;
60
+
61
+	for (i = 0; i < opp_table->path_count; i++) {
62
+		snprintf(name, sizeof(name), "icc-path-%.1d", i);
63
+
64
+		/* Create per-path directory */
65
+		d = debugfs_create_dir(name, pdentry);
66
+
67
+		debugfs_create_file("name", S_IRUGO, d, opp_table->paths[i],
68
+				    &bw_name_fops);
69
+		debugfs_create_u32("peak_bw", S_IRUGO, d,
70
+				   &opp->bandwidth[i].peak);
71
+		debugfs_create_u32("avg_bw", S_IRUGO, d,
72
+				   &opp->bandwidth[i].avg);
73
+	}
74
+}
75
+
76
+static void opp_debug_create_supplies(struct dev_pm_opp *opp,
3977 				      struct opp_table *opp_table,
4078 				      struct dentry *pdentry)
4179 {
....@@ -50,30 +88,21 @@
5088 		/* Create per-opp directory */
5189 		d = debugfs_create_dir(name, pdentry);
5290 
53
-		if (!d)
54
-			return false;
91
+		debugfs_create_ulong("u_volt_target", S_IRUGO, d,
92
+				     &opp->supplies[i].u_volt);
5593 
56
-		if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d,
57
-					  &opp->supplies[i].u_volt))
58
-			return false;
94
+		debugfs_create_ulong("u_volt_min", S_IRUGO, d,
95
+				     &opp->supplies[i].u_volt_min);
5996 
60
-		if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d,
61
-					  &opp->supplies[i].u_volt_min))
62
-			return false;
97
+		debugfs_create_ulong("u_volt_max", S_IRUGO, d,
98
+				     &opp->supplies[i].u_volt_max);
6399 
64
-		if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d,
65
-					  &opp->supplies[i].u_volt_max))
66
-			return false;
67
-
68
-		if (!debugfs_create_ulong("u_amp", S_IRUGO, d,
69
-					  &opp->supplies[i].u_amp))
70
-			return false;
100
+		debugfs_create_ulong("u_amp", S_IRUGO, d,
101
+				     &opp->supplies[i].u_amp);
71102 	}
72
-
73
-	return true;
74103 }
75104 
76
-int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
105
+void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
77106 {
78107 	struct dentry *pdentry = opp_table->dentry;
79108 	struct dentry *d;
....@@ -95,40 +124,24 @@
95124 
96125 	/* Create per-opp directory */
97126 	d = debugfs_create_dir(name, pdentry);
98
-	if (!d)
99
-		return -ENOMEM;
100127 
101
-	if (!debugfs_create_bool("available", S_IRUGO, d, &opp->available))
102
-		return -ENOMEM;
128
+	debugfs_create_bool("available", S_IRUGO, d, &opp->available);
129
+	debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic);
130
+	debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo);
131
+	debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend);
132
+	debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate);
133
+	debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate);
134
+	debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,
135
+			     &opp->clock_latency_ns);
103136 
104
-	if (!debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic))
105
-		return -ENOMEM;
106
-
107
-	if (!debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo))
108
-		return -ENOMEM;
109
-
110
-	if (!debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend))
111
-		return -ENOMEM;
112
-
113
-	if (!debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate))
114
-		return -ENOMEM;
115
-
116
-	if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate))
117
-		return -ENOMEM;
118
-
119
-	if (!opp_debug_create_supplies(opp, opp_table, d))
120
-		return -ENOMEM;
121
-
122
-	if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,
123
-				  &opp->clock_latency_ns))
124
-		return -ENOMEM;
137
+	opp_debug_create_supplies(opp, opp_table, d);
138
+	opp_debug_create_bw(opp, opp_table, d);
125139 
126140 	opp->dentry = d;
127
-	return 0;
128141 }
129142 
130
-static int opp_list_debug_create_dir(struct opp_device *opp_dev,
131
-				     struct opp_table *opp_table)
143
+static void opp_list_debug_create_dir(struct opp_device *opp_dev,
144
+				      struct opp_table *opp_table)
132145 {
133146 	const struct device *dev = opp_dev->dev;
134147 	struct dentry *d;
....@@ -137,36 +150,21 @@
137150 
138151 	/* Create device specific directory */
139152 	d = debugfs_create_dir(opp_table->dentry_name, rootdir);
140
-	if (!d) {
141
-		dev_err(dev, "%s: Failed to create debugfs dir\n", __func__);
142
-		return -ENOMEM;
143
-	}
144153 
145154 	opp_dev->dentry = d;
146155 	opp_table->dentry = d;
147
-
148
-	return 0;
149156 }
150157 
151
-static int opp_list_debug_create_link(struct opp_device *opp_dev,
152
-				      struct opp_table *opp_table)
158
+static void opp_list_debug_create_link(struct opp_device *opp_dev,
159
+				       struct opp_table *opp_table)
153160 {
154
-	const struct device *dev = opp_dev->dev;
155161 	char name[NAME_MAX];
156
-	struct dentry *d;
157162 
158163 	opp_set_dev_name(opp_dev->dev, name);
159164 
160165 	/* Create device specific directory link */
161
-	d = debugfs_create_symlink(name, rootdir, opp_table->dentry_name);
162
-	if (!d) {
163
-		dev_err(dev, "%s: Failed to create link\n", __func__);
164
-		return -ENOMEM;
165
-	}
166
-
167
-	opp_dev->dentry = d;
168
-
169
-	return 0;
166
+	opp_dev->dentry = debugfs_create_symlink(name, rootdir,
167
+						 opp_table->dentry_name);
170168 }
171169 
172170 /**
....@@ -177,20 +175,13 @@
177175  * Dynamically adds device specific directory in debugfs 'opp' directory. If the
178176  * device-opp is shared with other devices, then links will be created for all
179177  * devices except the first.
180
- *
181
- * Return: 0 on success, otherwise negative error.
182178  */
183
-int opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table)
179
+void opp_debug_register(struct opp_device *opp_dev, struct opp_table *opp_table)
184180 {
185
-	if (!rootdir) {
186
-		pr_debug("%s: Uninitialized rootdir\n", __func__);
187
-		return -EINVAL;
188
-	}
189
-
190181 	if (opp_table->dentry)
191
-		return opp_list_debug_create_link(opp_dev, opp_table);
192
-
193
-	return opp_list_debug_create_dir(opp_dev, opp_table);
182
+		opp_list_debug_create_link(opp_dev, opp_table);
183
+	else
184
+		opp_list_debug_create_dir(opp_dev, opp_table);
194185 }
195186 
196187 static void opp_migrate_dentry(struct opp_device *opp_dev,
....@@ -213,7 +204,7 @@
213204 
214205 	dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir,
215206 				opp_table->dentry_name);
216
-	if (!dentry) {
207
+	if (IS_ERR(dentry)) {
217208 		dev_err(dev, "%s: Failed to rename link from: %s to %s\n",
218209 			__func__, dev_name(opp_dev->dev), dev_name(dev));
219210 		return;
....@@ -248,19 +239,62 @@
248239 	opp_dev->dentry = NULL;
249240 }
250241 
242
+static int opp_summary_show(struct seq_file *s, void *data)
243
+{
244
+	struct list_head *lists = (struct list_head *)s->private;
245
+	struct opp_table *opp_table;
246
+	struct dev_pm_opp *opp;
247
+
248
+	mutex_lock(&opp_table_lock);
249
+
250
+	seq_puts(s, " device                rate(Hz)    target(uV)    min(uV)    max(uV)\n");
251
+	seq_puts(s, "-------------------------------------------------------------------\n");
252
+
253
+	list_for_each_entry(opp_table, lists, node) {
254
+		seq_printf(s, " %s\n", opp_table->dentry_name);
255
+		mutex_lock(&opp_table->lock);
256
+		list_for_each_entry(opp, &opp_table->opp_list, node) {
257
+			if (!opp->available)
258
+				continue;
259
+			seq_printf(s, "%31lu %12lu %11lu %11lu\n",
260
+				   opp->rate,
261
+				   opp->supplies[0].u_volt,
262
+				   opp->supplies[0].u_volt_min,
263
+				   opp->supplies[0].u_volt_max);
264
+			if (opp_table->regulator_count > 1)
265
+				seq_printf(s, "%44lu %11lu %11lu\n",
266
+					   opp->supplies[1].u_volt,
267
+					   opp->supplies[1].u_volt_min,
268
+					   opp->supplies[1].u_volt_max);
269
+		}
270
+		mutex_unlock(&opp_table->lock);
271
+	}
272
+
273
+	mutex_unlock(&opp_table_lock);
274
+
275
+	return 0;
276
+}
277
+
278
+static int opp_summary_open(struct inode *inode, struct file *file)
279
+{
280
+	return single_open(file, opp_summary_show, inode->i_private);
281
+}
282
+
283
+static const struct file_operations opp_summary_fops = {
284
+	.open		= opp_summary_open,
285
+	.read		= seq_read,
286
+	.llseek		= seq_lseek,
287
+	.release	= single_release,
288
+};
289
+
251290 static int __init opp_debug_init(void)
252291 {
253292 	/* Create /sys/kernel/debug/opp directory */
254293 	rootdir = debugfs_create_dir("opp", NULL);
255
-	if (!rootdir) {
256
-		pr_err("%s: Failed to create root directory\n", __func__);
257
-		return -ENOMEM;
258
-	}
294
+
295
+	debugfs_create_file("opp_summary", 0444, rootdir, &opp_tables,
296
+			    &opp_summary_fops);
259297 
260298 	return 0;
261299 }
262
-#ifdef CONFIG_ROCKCHIP_THUNDER_BOOT
263
-core_initcall_sync(opp_debug_init);
264
-#else
265300 core_initcall(opp_debug_init);
266
-#endif